<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>div1</div>
<div>div2</div>
<div>div3</div>

<span>span1</span>
<span>span2</span>
<span>span3</span>
<div>头</div>
<div>体</div>
<div>脚</div>
<h1>html5 新增标签  划分三个大区</h1>
<header></header>
<main></main>
<footer></footer>
</body>
</html>